Suggestions by @frxns

Colin Firth

as Henry Allen in DCEU Rebooted

Riley Keough

as Iris West in DCEU Rebooted

Jóhannes Haukur Jóhannesson

as Hector Hammond in DCEU Rebooted

Djimon Hounsou

as Mongul in DCEU Rebooted

Mahershala Ali

as The Monitor in DCEU Rebooted

Mahershala Ali

as Anti Monitor in DCEU Rebooted

Jensen Ackles

as Cyborg Superman in DCEU Rebooted

Rami Malek

as Sodam Yat in DCEU Rebooted

Maya Thurman-Hawke

as Arisia Rrab in DCEU Rebooted

Jessica Henwick

as Katma Tui in DCEU Rebooted

Terry Crews

as Kilowog in DCEU Rebooted

Kevin Hart

as Ch'p of H'lven in DCEU Rebooted

Patrick Stewart

as Ganthet in DCEU Rebooted

Robin Lord Taylor

as William Hand in DCEU Rebooted

Terry O'Quinn

as Abin Sur in DCEU Rebooted

Dan Stevens

as Larfleeze in DCEU Rebooted

Dwayne Johnson

as Atrocitus in DCEU Rebooted

Betty Gilpin

as Cowgirl in DCEU Rebooted

Ana de Armas

as Star Sapphire in DCEU Rebooted

Seann William Scott

as Green Lantern (Guy Gardner) in DCEU Rebooted